package.json: bump keytar version

So that it builds on node 12.

package.json

@@ -21,7 +21,7 @@
     "request": "^2.88.0"
   },
   "optionalDependencies": {
-    "keytar": "^4.3.0"
+    "keytar": "^4.6.0"
   },
   "bin": {
     "graph": "bin/graph"

yarn.lock

@@ -1610,9 +1610,10 @@ expand-brackets@^2.1.4:
     snapdragon "^0.8.1"
     to-regex "^3.0.1"
 
-expand-template@^1.0.2:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/expand-template/-/expand-template-1.1.1.tgz#981f188c0c3a87d2e28f559bc541426ff94f21dd"
+expand-template@^2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/expand-template/-/expand-template-2.0.3.tgz#6e14b3fcee0f3a6340ecb57d2e8918692052a47c"
+  integrity sha512-XYfuKMvj4O35f/pOXLObndIRvyQ+/+6AhODh+OKWj9S9498pHHn/IMszH+gt0fBCRWMNfk1ZSp5x3AifmnI2vg==
 
 expect@^24.3.0:
   version "24.3.0"
@@ -3112,12 +3113,13 @@ keypair@^1.0.1:
   resolved "https://registry.npmjs.org/keypair/-/keypair-1.0.1.tgz#7603719270afb6564ed38a22087a06fc9aa4ea1b"
   integrity sha1-dgNxknCvtlZO04oiCHoG/Jqk6hs=
 
-keytar@^4.3.0:
-  version "4.3.0"
-  resolved "https://registry.yarnpkg.com/keytar/-/keytar-4.3.0.tgz#4a3afd64fdeec300716ccf3985fdcf1cfd6e77e9"
+keytar@^4.6.0:
+  version "4.6.0"
+  resolved "https://registry.yarnpkg.com/keytar/-/keytar-4.6.0.tgz#18b2e9d6ba68ed32e30ccc78b209b4f6cdc1cbbb"
+  integrity sha512-8wWWTC62QHvUvgW/QYyJv7X0GFZfp2Ykr5n3PuXKADro0Sv2RKvuYxbkzoZvsw33EDNAKnUTSA0/KLGN/MbwDw==
   dependencies:
-    nan "2.8.0"
-    prebuild-install "^5.0.0"
+    nan "2.13.2"
+    prebuild-install "5.3.0"
 
 kind-of@^3.0.2, kind-of@^3.0.3, kind-of@^3.2.0:
   version "3.2.2"
@@ -3582,9 +3584,10 @@ mute-stream@0.0.7:
   resolved "https://registry.npmjs.org/mute-stream/-/mute-stream-0.0.7.tgz#3075ce93bc21b8fab43e1bc4da7e8115ed1e7bab"
   integrity sha1-MHXOk7whuPq0PhvE2n6BFe0ee6s=
 
-nan@2.8.0:
-  version "2.8.0"
-  resolved "https://registry.yarnpkg.com/nan/-/nan-2.8.0.tgz#ed715f3fe9de02b57a5e6252d90a96675e1f085a"
+nan@2.13.2:
+  version "2.13.2"
+  resolved "https://registry.yarnpkg.com/nan/-/nan-2.13.2.tgz#f51dc7ae66ba7d5d55e1e6d4d8092e802c9aefe7"
+  integrity sha512-TghvYc72wlMGMVMluVo9WRJc0mB8KxxF/gZ4YYFy7V2ZQX9l7rgbPg7vjS9mt6U5HXODVFVI2bOduCzwOMv/lw==
 
 nan@^2.11.1, nan@^2.2.1, nan@^2.9.2:
   version "2.12.1"
@@ -3641,9 +3644,10 @@ nice-try@^1.0.4:
   resolved "https://registry.npmjs.org/nice-try/-/nice-try-1.0.5.tgz#a3378a7696ce7d223e88fc9b764bd7ef1089e366"
   integrity sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ==
 
-node-abi@^2.2.0:
-  version "2.4.5"
-  resolved "https://registry.yarnpkg.com/node-abi/-/node-abi-2.4.5.tgz#1fd1fb66641bf3c4dcf55a5490ba10c467ead80c"
+node-abi@^2.7.0:
+  version "2.8.0"
+  resolved "https://registry.yarnpkg.com/node-abi/-/node-abi-2.8.0.tgz#bd2e88dbe6a6871e6dd08553e0605779325737ec"
+  integrity sha512-1/aa2clS0pue0HjckL62CsbhWWU35HARvBDXcJtYKbYR7LnIutmpxmXbuDMV9kEviD2lP/wACOgWmmwljghHyQ==
   dependencies:
     semver "^5.4.1"
 
@@ -4084,17 +4088,18 @@ posix-character-classes@^0.1.0:
   resolved "https://registry.npmjs.org/posix-character-classes/-/posix-character-classes-0.1.1.tgz#01eac0fe3b5af71a2a6c02feabb8c1fef7e00eab"
   integrity sha1-AerA/jta9xoqbAL+q7jB/vfgDqs=
 
-prebuild-install@^5.0.0:
-  version "5.2.1"
-  resolved "https://registry.yarnpkg.com/prebuild-install/-/prebuild-install-5.2.1.tgz#87ba8cf17c65360a75eefeb3519e87973bf9791d"
+prebuild-install@5.3.0:
+  version "5.3.0"
+  resolved "https://registry.yarnpkg.com/prebuild-install/-/prebuild-install-5.3.0.tgz#58b4d8344e03590990931ee088dd5401b03004c8"
+  integrity sha512-aaLVANlj4HgZweKttFNUVNRxDukytuIuxeK2boIMHjagNJCiVKWFsKF4tCE3ql3GbrD2tExPQ7/pwtEJcHNZeg==
   dependencies:
     detect-libc "^1.0.3"
-    expand-template "^1.0.2"
+    expand-template "^2.0.3"
     github-from-package "0.0.0"
     minimist "^1.2.0"
     mkdirp "^0.5.1"
     napi-build-utils "^1.0.1"
-    node-abi "^2.2.0"
+    node-abi "^2.7.0"
     noop-logger "^0.1.1"
     npmlog "^4.0.1"
     os-homedir "^1.0.1"